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参数资料
| 型号： | DS3930E+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/12页 |
| 文件大小： | 0K |
| 描述： | IC POT NV HEX I/O MEM 20-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 接片： | 256 |
| 电阻（欧姆）： | 16.5k |
| 电路数： | 6 |
| 温度系数： | 标准值 ±250 ppm/°C |
| 存储器类型： | 非易失 |
| 接口： | I²C（设备位址） |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 带卷 (TR) |
DS3930
Hex Nonvolatile Potentiometer with
I/O and Memory
____________________________________________________________________
11
Applications Information
Power Supply Decoupling
To achieve the best results when using the DS3930,
decouple the power supply with a 0.1F high-quality,
ceramic, surface-mount capacitor. Surface-mount com-
ponents minimize lead inductance, which improves
performance, and ceramic capacitors tend to have
adequate high-frequency response for decoupling
applications. The capacitor should be placed as close
as possible to the VCC and GND pins.
SDA
SCL
tHD:STA
tLOW
tHIGH
tR
tF
tBUF
tHD:DAT
tSU:DAT
REPEATED
START
tSU:STA
tHD:STA
tSU:STO
tSP
STOP
START
Figure 5. 2-Wire AC Characteristics
SLAVE
ACK
10
0
1
R/W
A0*
A1*
SLAVE
ACK
A2*
MSB
LSB
DEVICE IDENTIFIER
DEVICE
ADDRESS
READ/
WRITE
MSB
LSB
REGISTER ADDRESS
SLAVE
ACK
MSB
LSB
b7
b6
b5
b4
b3
b2
b1
b0
SLAVE
ACK
STOP
*THE ADDRESS DETERMINED BY A0, A1, AND A2 MUST
MATCH THE ADDRESS SET BY THE ADDRESS PINS.
DATA
TYPICAL 2-WIRE WRITE TRANSACTION
EXAMPLE 2-WIRE TRANSACTIONS (WHEN A0, A1, AND A2 ARE ZERO)
A) SINGLE-BYTE WRITE
-WRITE TO POT 0 REGISTER
B) SINGLE-BYTE READ
-READ FROM POT 0 REGISTER
D) MULTIPLE BYTE WRITE
-2 BYTE WRITE TO EEPROM
E) MULTIPLE BYTE READ
-2 BYTE READ FROM EEPROM
START
A0h
SLAVE
ACK
SLAVE
ACK
SLAVE
ACK
SLAVE
ACK
F0h
00h
SLAVE
ACK
SLAVE
ACK
SLAVE
ACK
SLAVE
ACK
DATA
SLAVE
ACK
STOP
POT SETTING
10100000
10100001
REPEATED
START
SLAVE
ACK
MASTER
ACK
DATA
MASTER
NACK
STOP
DATA
A1h
b7
b6
b5
b4
b3
b2
b1
b0
11110000
C) SINGLE-BYTE WRITE
-SET I/O0 PIN TO A "1"
START
A0h
SLAVE
ACK
F6h
SLAVE
ACK
DATA
SLAVE
ACK
STOP
XXX0XXX1
10100000
11110110
11110000
00000000
REPEATED
START
DATA
POT SETTING
MASTER
NACK
STOP
SLAVE
ACK
10100001
A1h
STOP
SLAVE
ACK
DATA
SLAVE
ACK
DATA
Figure 6. Example 2-Wire Transactions
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